September weather forecast and climate
Harkers Island, NC

The first month of the autumn, September, is still a warm month in Harkers Island, North Carolina, with temperature in the range of an average low of 74.3°F (23.5°C) and an average high of 79.7°F (26.5°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still warm 79.7°F (26.5°C). In Harkers Island, the average low-temperature is 74.3°F (23.5°C).

Humidity

The average relative humidity is 77%.

Rainfall

In Harkers Island, during September, the rain falls for 17.5 days and regularly aggregates up to 4.49" (114mm) of precipitation. In Harkers Island, North Carolina, during the entire year, the rain falls for 181.4 days and collects up to 34.76" (883mm) of precipitation.

Snowfall

In Harkers Island snow does not fall in March through December.

Ocean temperature

In September, the average ocean temperature in Harkers Island is 80.8°F (27.1°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in Harkers Island is 12.4h.

Sunshine

In September, the average sunshine in Harkers Island is 9.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Harkers Island?

The average high-temperature, in September, in Harkers Island, North Carolina, is 79.7°F (26.5°C), while the average low-temperature is 74.3°F (23.5°C).

What is the average humidity in September in Harkers Island?

The average relative humidity in September in Harkers Island is 77%.

How much does it rain in Harkers Island in September?

In September, in Harkers Island, North Carolina, the rain falls for 17.5 days. Throughout September, 4.49" (114mm) of precipitation is accumulated.

When it does not snow in Harkers Island?

In Harkers Island, North Carolina, snow does not fall in March through December.

What is the water temperature in September in Harkers Island?

In September, the average ocean temperature in Harkers Island, North Carolina, is 80.8°F (27.1°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Harkers Island?

The average length of the day in September in Harkers Island, North Carolina, is 12.4h.

How many hours of sunshine does Harkers Island have in September?

In Harkers Island, North Carolina, the average sunshine in September is 9.6h.

How high is the UV index in September in Harkers Island?

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Harkers Island, NC
  • Average high temperature in September: 26.5°C

The warmest month (with the highest average high temperature) is July (28.5°C).
The month with the lowest average high temperature is January (12.3°C).

  • Average low temperature in September: 23.5°C

The month with the highest average low temperature is July (25.7°C).
The coldest month (with the lowest average low temperature) is January (7°C).

Average pressure in September - Harkers Island, NC
  • Average pressure in September: 1016.2mbar

The month with the highest atmospheric pressure is December (1019.9mbar).
The month with the lowest atmospheric pressure is June (1015.1mbar).

Average wind speed in September - Harkers Island, NC
  • Average wind speed in September: 18.7km/h

The windiest months (with the highest average wind speed) are February and March (22.6km/h).
The calmest month (with the lowest average wind speed) is August (16.7km/h).

Average humidity in September - Harkers Island, NC
  • Average humidity in September: 77%

Months with the highest relative humidity are May, June, July and August (78%).
Months with the lowest relative humidity are February, March and October (74%).

Average rainfall in September - Harkers Island, NC
  • Average rainfall in September: 114mm

The wettest month (with the highest rainfall) is August (123mm).
The driest month (with the least rainfall) is January (33mm).

Average rainfall days in September - Harkers Island, NC
  • Average rainfall days in September: 17.5 days

The month with the highest number of rainy days is August (22.3 days).
Months with the least rainy days are February and November (11.1 days).

Average snowfall in September - Harkers Island, NC
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (6mm).
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in September - Harkers Island, NC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.6 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

Average sea temperature in September - Harkers Island, NC
  • Average sea temperature in September: 27.1°C

The best month for swimming (with the highest average sea temperature) is August (28.4°C).
The coldest month (with the lowest average sea temperature) is February (16.3°C).

Average daylight in September / Average sunshine in September - Harkers Island, NC
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9.6h

The month with the most sunshine is June (Average sunshine: 10.9h).
Months with the least sunshine are January and December (Average sunshine: 5.5).

Average sunshine days in September - Harkers Island, NC
  • Average sunshine days in September: 9.7 days

The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is August (5.9 days).

Average UV index in September - Harkers Island, NC
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

Average cloud cover in September - Harkers Island, NC
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in September - Harkers Island, NC
  • Average visibility in September: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).